Show EVER TRY THIS tie a string about a yard long to a common door key and take the string in the right hand holdi ngit so the key would clear the floor four or five inches if you can cah hold the string steady enough the fay k cy y will begin to swing awing back and forth in a straight line says an exchange let another persona person take your lefthand left hand in his and the motion odthe key will chan gefrom the pendulum like s swing wl i ng to toa a circular swing if a third ierson person will put his big hand on the shoulder of the second person the key will stop timit and thelex then explain if you can exchange |